misconception_fixer

In South Korea, it is commonly and incorrectly believed that sleeping in a closed room with an electric fan running can be fatal. According to the Korean government, "In some cases, a fan turned on too long can cause death from suffocation, hypothermia, or fire from overheating." The Korea Consumer Protection Board issued a consumer safety alert recommending that electric fans be set on timers, direction changed and doors left open. Belief in fan death is common even among knowledgeable medical professionals in Korea. According to Yeon Dong-su, dean of Kwandong University's medical school, "If it is completely sealed, then in the current of an electric fan, the temperature can drop low enough to cause a person to die of hypothermia."[185] Whereas an air conditioner transfers heat from the air and cools it, a fan moves air without change of temperature to increase the evaporation of sweat. Leaving a fan running in an unoccupied room will not cool it; in fact, due to energy losses from the motor and viscous dissipation, a fan will slightly heat a room.

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Eating less than an hour before swimming does not increase the risk of experiencing muscle cramps or drowning. One study shows a correlation between alcohol consumption and drowning, but there is no evidence cited regarding stomach cramps or the consumption of food.

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There is no scientific evidence for the existence of “photographic” or eidetic memory (the ability to remember images with so high a precision as to mimic a camera).[280] Many people have claimed to have a photographic memory, but those people have been shown to have good memories as a result of mnemonic devices rather than a natural capacity for detailed memory encoding.[281] There are rare cases of individuals with exceptional memory, but none of them has a memory that mimics a camera. In recent years, a phenomenon labeled hyperthymesia has been studied, where individuals have superior autobiographical memory—in some cases being able to recall every meal they have ever eaten. One example is actress Marilu Henner.[282]

This response was automatically generated from Wikipedia's list of common misconceptions